mysql 5.5.42升级到5.6.24步骤

cqlinx

　　1、第一步：
　　首先找到5.6的yum源头；
　　wget http://repo.mysql.com/mysql-community-release-el6-5.noarch.rpm
　　rpm -ivh mysql-community-release-el6-5.noarch.rpm 
　　yum -y update mysql-server
　　2、mysql5.6与mysql5.5的不同之处如下：
　　mysql  5.6会多五张表，分别为：slave_master_info
　　slave_relay_log_info
　　slave_worker_info
　　innodb_index_stats
　　innodb_table_stats
　　重启mysql 
　　3、检查和执行mysql 数据库表操作：
　　运行如下命令：
　　mysql_upgrade -uroot -h192.168.30.167 -p
　　输入密码即可；
　　如果这个地方执行不下去，可依次执行如下语句，逐条进行排错：
　　mysqlcheck --all-databases --check-upgrade --auto-repair
　　mysql
　　mysqlcheck --all-databases --check-upgrade --fix-db-names --fix-table-names
　　这步都ok之后，可尝试进行第五步操作。
　　4、重启mysqld，登陆进行验证；看这五张表是否存在，或者查看mysqld的错误日志，看其是否报错；
　　
　　5、如果报错，可登陆mysql；使用如下语句建表：
　　1、innodb_index_stats
　　
CREATE TABLE IF NOT EXISTS innodb_index_stats (　　database_name           VARCHAR(64) NOT NULL,
　　table_name          VARCHAR(64) NOT NULL,
　　index_name          VARCHAR(64) NOT NULL,
　　last_update         TIMESTAMP NOT NULL NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
　　/* there are at least:
　　stat_name='size'
　　stat_name='n_leaf_pages'
　　stat_name='n_diff_pfx%' */
　　stat_name           VARCHAR(64) NOT NULL,
　　stat_value          BIGINT UNSIGNED NOT NULL,
　　sample_size         BIGINT UNSIGNED,
　　stat_description        VARCHAR(1024) NOT NULL,
　　PRIMARY KEY (database_name, table_name, index_name, stat_name)
　　) ENGINE=INNODB DEFAULT CHARSET=utf8 COLLATE=utf8_bin STATS_PERSISTENT=0
　　2、inndb_table_stats
　　
CREATE TABLE IF NOT EXISTS innodb_table_stats (　　database_name           VARCHAR(64) NOT NULL,
　　table_name          VARCHAR(64) NOT NULL,
　　last_update         TIMESTAMP NOT NULL NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
　　n_rows              BIGINT UNSIGNED NOT NULL,
　　clustered_index_size        BIGINT UNSIGNED NOT NULL,
　　sum_of_other_index_sizes    BIGINT UNSIGNED NOT NULL,
　　PRIMARY KEY (database_name, table_name)
　　) ENGINE=INNODB
　　3、 slave_master_info;
　　CREATE TABLE `slave_master_info` (
　　`Number_of_lines` int(10) unsigned NOT NULL COMMENT 'Number of lines in the file.',
　　`Master_log_name` text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL COMMENT 'The name of the master binary log currently being read from the master.',
　　`Master_log_pos` bigint(20) unsigned NOT NULL COMMENT 'The master log position of the last read event.',
　　`Host` char(64) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL DEFAULT '' COMMENT 'The host name of the master.',
　　`User_name` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The user name used to connect to the master.',
　　`User_password` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The password used to connect to the master.',
　　`Port` int(10) unsigned NOT NULL COMMENT 'The network port used to connect to the master.',
　　`Connect_retry` int(10) unsigned NOT NULL COMMENT 'The period (in seconds) that the slave will wait before trying to reconnect to the master.',
　　`Enabled_ssl` tinyint(1) NOT NULL COMMENT 'Indicates whether the server supports SSL connections.',
　　`Ssl_ca` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The file used for the Certificate Authority (CA) certificate.',
　　`Ssl_capath` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The path to the Certificate Authority (CA) certificates.',
　　`Ssl_cert` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The name of the SSL certificate file.',
　　`Ssl_cipher` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The name of the cipher in use for the SSL connection.',
　　`Ssl_key` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The name of the SSL key file.',
　　`Ssl_verify_server_cert` tinyint(1) NOT NULL COMMENT 'Whether to verify the server certificate.',
　　`Heartbeat` float NOT NULL,
　　`Bind` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'Displays which interface is employed when connecting to the MySQL server',

　　`Ignored_server_ids` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The number of server>　　`Uuid` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The master server uuid.',
　　`Retry_count` bigint(20) unsigned NOT NULL COMMENT 'Number of reconnect attempts, to the master, before giving up.',
　　`Ssl_crl` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The file used for the Certificate Revocation List (CRL)',
　　`Ssl_crlpath` text CHARACTER SET utf8 COLLATE utf8_bin COMMENT 'The path used for Certificate Revocation List (CRL) files',
　　`Enabled_auto_position` tinyint(1) NOT NULL COMMENT 'Indicates whether GTIDs will be used to retrieve events from the master.',
　　PRIMARY KEY (`Host`,`Port`)
　　) ENGINE=InnoDB DEFAULT CHARSET=utf8 STATS_PERSISTENT=0 COMMENT='Master Information' |
　　
　　4、slave_worker_info
　　CREATE TABLE `slave_worker_info` (
　　`Id` int(10) unsigned NOT NULL,
　　`Relay_log_name` text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,
　　`Relay_log_pos` bigint(20) unsigned NOT NULL,
　　`Master_log_name` text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,
　　`Master_log_pos` bigint(20) unsigned NOT NULL,
　　`Checkpoint_relay_log_name` text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,
　　`Checkpoint_relay_log_pos` bigint(20) unsigned NOT NULL,
　　`Checkpoint_master_log_name` text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,
　　`Checkpoint_master_log_pos` bigint(20) unsigned NOT NULL,
　　`Checkpoint_seqno` int(10) unsigned NOT NULL,
　　`Checkpoint_group_size` int(10) unsigned NOT NULL,
　　`Checkpoint_group_bitmap` blob NOT NULL,
　　PRIMARY KEY (`Id`)
　　) ENGINE=InnoDB DEFAULT CHARSET=utf8 STATS_PERSISTENT=0 COMMENT='Worker Information'
　　
　　5、
　　CREATE TABLE `slave_relay_log_info` (
　　`Number_of_lines` int(10) unsigned NOT NULL COMMENT 'Number of lines in the file or rows in the table. Used to version table definitions.',

　　`Relay_log_name` text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL COMMENT 'The name of the current>
　　`Relay_log_pos` bigint(20) unsigned NOT NULL COMMENT 'The>
　　`Master_log_name` text CHARACTER SET utf8 COLLATE utf8_bin NOT NULL COMMENT 'The name of the master binary log file from which the events in the>　　`Master_log_pos` bigint(20) unsigned NOT NULL COMMENT 'The master log position of the last executed event.',
　　`Sql_delay` int(11) NOT NULL COMMENT 'The number of seconds that the slave must lag behind the master.',
　　`Number_of_workers` int(10) unsigned NOT NULL,

　　`Id` int(10) unsigned NOT NULL COMMENT 'Internal>　　PRIMARY KEY (`Id`)
　　) ENGINE=InnoDB DEFAULT CHARSET=utf8 STATS_PERSISTENT=0 COMMENT='Relay Log Information'
　　
　　6、确保上面五张表都正确之后，重启数据库，就不会再有报错信息出现。